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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]  
Schedule of share-based compensation, stock options, activity
The following table provides a reconciliation of outstanding stock options for the fiscal year ended December 31, 2022.
 
 Shares Under
Option		Weighted
Average
Price		Weighted
Average
Remaining
Contract Life
(Years)		Aggregate
Intrinsic
Value
(000’s)
Outstanding January 1, 2022563,226 $165.98 
Granted86,220 231.64 
Exercised(29,353)132.31 
Forfeited(2,237)153.14 
Outstanding December 31, 2022617,856 176.79 4.2$30,555 
Exercisable December 31, 2022292,824 159.93 3.218,566 
Schedule of nonvested restricted stock units activity
The following table provides a reconciliation of non-vested restricted share and share unit awards ("RSU") for the fiscal year ended December 31, 2022.
 
 SharesWeighted Average
Grant-Date Fair Value
Nonvested January 1, 2022156,659 $192.44 
Granted90,970 228.78 
Vested(71,822)185.06 
Forfeited(7,521)227.96 
Nonvested December 31, 2022168,286 213.65 
Schedule of share-based payment award, stock options, valuation assumptions
The Company uses the Black-Scholes option valuation model to determine the fair value of stock option awards granted. The weighted average fair value of and related assumptions for options granted are as follows:
 
 202220212020
Weighted average fair value of options granted$70.39$74.04$38.09
Assumptions:
Risk-free interest rate2.83%0.66%0.30%
Expected dividend yield0.92%0.72%1.27%
Expected stock price volatility35.0%35.0%33.0%
Expected life of options (years)4.44.44.7